Metal trim for plastered walls



Jan. 8 1924.

G. A. KNAPP METAL TRIM FOR PLASTERED'WALLS Filed Feb; 20, 1922 Ge 9e fi 753M990 v I Patented Jan. 8, 1924.

UNITED STATES PATENT OFFICE.

GEORGE A. APP, OF CHICAGO, ILLINOIS, ASSIGNOR TO KNAPP BROTHERS MANUFAC- TUBING COMPANY, A CORPORATION OF ILLINOIS.

IE'IAL TRIM FOR PLASTERED WALLS.

Application filed February 20, 1922. Serial No. 587,844.

To all whom it may concern.

Be it known that I, Gnonon A. KNAPP, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Metal Trims for Plastered Walls, of which the following is a specification.

This invention relates to metal trims and fittings for the bounding edges of plastered walls.

One of the objects of the invention is to provide improved metal finish about plastered walls bounding door openings therein in which the cooperating parts are made of metal, someot which are ap licable to the wall to provide grounds by w ich the thickness of the plaster coating is to be gaged.

Another object is to provide a structure of the character described in which parts are designed to be attached to the wall before the application of the plaster thereto, other parts being attachable after the jamb plates or pilasters of the door opening have been put in lace.

Another object is to provide, in a folded metal part spaced away from the wall, a salient sharp terminal edge serving as a ground for gaging the thickness of the plaster and of a character that will not visibly define or show the line of juncture between said part or trim and the p aster.

Other objects and advanta es will hereinafter appear from a consi eration of the following description when taken in conjunction with the drawings, wherein Fig. 1 is a horizontal section of a wall and a door opening showing in cross section the trim bounding the bottom of the plastered wall and the vertical edges thereof adjacent said openin t Fig. 2 is an elevation of a wall showing the trim applied to the edges oi the plaster coating thereof and a portion of the plaster broken away.

Fig. 3 is a section taken on line 3-3 of Fig. 1, and

Fig. 4 is an enlarged sectional view of the upper edge of the base board, showing the upper edge bent into form a means for spacing the face of the board away from the wall and to provide a knee or ground.

In all the views the same reference characters are employed to indicate similar parts In the specific showing 5 is the wall to receive a coat of plaster, the wall having an opening within which a door is to be fitted. 6 is a stud or buck bounding the opening at its vertical edges, and 7 is a wooden trim to be applied to the buck after the plaster 8 has been applied to the wall. 9 is a bead strip extending vertically. of the door and having a nose 10 that is located insideof the outer edge of the buck 6 and having an extended curved portion 11 serving as a ground for the plaster 8. The bead 9 rests upon the plinth 12 which has a contour at 13 substantially corresponding with the contour of the head 9 and a stri 33 to be subsequently applied. The plint 12 also has a contour that corresponds with the base board 14. The plinth 12. is provided with feet 15 and 16 which space the surface 13 away from the wall 5. The upper edge of plinth has an extension 17 which normally rests upon the base portion 18 of the base board 14, and is held against the wall by nails or screws 19. The base board is rovided with a front face 20 curved at its ower edge, as at 21, and'terminating in a vertical portion 22 near the wall to which a side projection 23 from the plinth 13 extends. A final'ten minal end 24 of the base board is secured to the floor 26 by nails or screws 25. The upper edge 27 of the base board is made very sharp, as shown, by upsetting or swaging the curved portion of the part that extends inwardly and laterally and then vertically to provide the sharp angular portion 29 and the knee 28. The object of providing the sharp an ular edge 29 is so that the plaster will finis up to this edge without leaving a thin film of plaster below, which would occur if the ed e 29 were rounded instead of being made into a sharp salient edge. A thin feather edge of plaster at the junction of the plastered wall with the upper edge of the base board is to be avoided because in the course of time the plaster breaks out and leaves a ve objectionable groove, and this is avoided y making the edge 29 sharp, as shown.

One of the advanta es of placing the vertical bead 9 back 0 the buck 6 before the plaster is applied to the wall is to. avoid injuring the trim during this operation,

and after the plaster has been applied the .vertical strip 33 may be made to overlie the wooden trim 7 and the nose 10 of the bead. The strip 33 corresponds in contour to the outer portion of the plinth 13, so that the finish provided by the strip 33 is continued substantially to the floor.

I have used the word trim in the specification in its broadest sense to indicate any sort of a metal finish that may be applied to the boundary edges of a plastered wall, or wall to be plastered, and not in the narrow sense in which the word may be used to designate a particular part of such a structure.

While I have herein described a single embodiment of my invention for the purpose of clear disclosure, it will be manifest to persons skilled in the art that many changes may be made in the general arrangement and configuration of the parts, within the sccipe of the appended claims.

aving described my invention what I claim as new and desire to secure by Letters Patent, is:

1. A sheet metal trim for bounding a plastered wall having an edge bent laterally to space the trim from an unplastered wall and to provide a knee to serve as a ground to gage the thickness of a plaster coating, the bend at the knee being formed after bending into a sharp salient'edge in a plane with the exposed face of the trim.

2. A sheet metal base board for bounding the lower edge of plastered walls having its upper edge bent to space it away from an unplastered wall and to provide a knee to serve as a ground to gage the thickness of the plaster coating, the bend at the knee being formed after bending into a sharp salient edge in. a plane with the exposed face of the board.

3. A sheet metal base board for bounding the lower edge of plastered walls having its upper edge bent to space it away from an unplastered wall and to provide a knee to serve as a ground to gage the thickness of a plaster coating, the bend at the knee being swaged into a sharp salient edge in a plane with the exposed face of the board and a plinth having a side and front face contour corresponding with the face of the board and having an angular upper edge in line with the upper 'edge of theboard forming a part of therasing or trim for a door opening and a core strip extending from the upper plinth to the subsequently 4 applied trim.

4. A sheet metal strip formed at one edge to provide a knee to serve as a ground for a wall to be plastered, the juncture of the angularly disposed walls at the knee comprising a substantially acute sharp edge.

In testimony whereof 'I hereunto subscribed my name.

GEORGE A. KNAPP 

